CN208337581U - A kind of optical fiber detector based on distributed vector network analyzer - Google Patents
A kind of optical fiber detector based on distributed vector network analyzer Download PDFInfo
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- CN208337581U CN208337581U CN201821004016.XU CN201821004016U CN208337581U CN 208337581 U CN208337581 U CN 208337581U CN 201821004016 U CN201821004016 U CN 201821004016U CN 208337581 U CN208337581 U CN 208337581U
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Abstract
The utility model relates to a kind of optical fiber detectors based on distributed vector network analyzer.The utility model includes for generating the network parameter analysis module of radiofrequency signal, for being light modulating signal for rf-signal modulation and tested cable being reflected the light modulation demodulation module and wireless communication module that the light modulating signal understood is demodulated into radiofrequency signal, the light modulation demodulation module is for connecting tested optical cable, the light modulation demodulation module connects network parameter analysis module, and the network parameter analysis module connects wireless communication module.The utility model has given full play to the advantages such as the calibration of vector network analyzer, Larger Dynamic range, high measurement accuracy, can the parameters such as precise measurement optical fiber attenuation, splicing loss, fault point locating, can accurately obtain influence of the lightguide cable link to modulated signal.
Description
Technical field
It is specifically a kind of based on distributed vector network analyzer the utility model relates to technical field of optical fiber detection
Optical fiber detector.
Background technique
Optical fiber has many advantages as telecommunication media, with high-speed broadband data service, video image business it is quick
Development, requirement of the people to the communication quality of lightguide cable link is higher and higher, thus accurately and quickly to lightguide cable link carry out
Optical cable laying quality, fibre junction quality and optical fiber sole mass measure, and are the basic demands of optical cable construction and maintenance.
Existing optical fiber measurement mode mainly uses OTDR (optical time domain reflectometer).It is according to the back scattering of light and luxuriant and rich with fragrance
The production of alunite ear inversion principle, the rear orientation light generated when being propagated in a fiber using light obtain corresponding information.It can be used for surveying
It measures optical fiber attenuation, splicing loss, fiber failure point location and understands optical fiber along the loss distribution situation of length.
Existing optical fiber measurement tool OTDR, major defect are the measurements that cannot achieve to modulated signal, cannot detect tune
The actual transmissions characteristic of signal processed in a fiber.And OTDR is when detecting lightguide cable link, meeting at the tie point of OTDR and optical fiber
Check frequency is generated, so that case point and the fault point in optical fiber link cannot be accurately positioned in certain distance (or time).
In addition to this, with the development of fiber optic communication, the indexs such as dynamic range, precision, the detection length of OTDR are up for improving.
Utility model content
Aiming at the defects existing in the prior art, the technical problem to be solved by the present invention is to provide one kind
Optical fiber detector based on distributed vector network analyzer.
The utility model technical solution used for the above purpose is: one kind is based on distributed vector network analysis
The optical fiber detector of instrument, including for generating radiofrequency signal network parameter analysis module, for being by rf-signal modulation
The light modulating signal that tested cable is reflected back simultaneously is demodulated into the light modulation demodulation module of radiofrequency signal and wireless by light modulating signal
Communication module, the light modulation demodulation module is for connecting tested optical cable, the light modulation demodulation module connection network parameter point
Module is analysed, the network parameter analysis module connects wireless communication module.
The network parameter analysis module includes: central control circuit, the first radio frequency interface, in central control circuit
Control under generate radiofrequency signal radio circuit under the control of central control circuit will control signal and it is synchronous touch
It is sent to the 4G wireless interface of wireless communication module；First radio frequency interface connects the radio circuit, described to penetrate
Frequency circuit connects the central control circuit, and the central control circuit connects the 4G wireless interface, the 4G wireless interface
For connecting wireless communication module.
The light modulation demodulation module includes penetrating for receiving the second of the radiofrequency signal that network parameter analysis module generates
Frequency interface, for by the signal processing circuit and photoelectric conversion circuit on rf-signal modulation to light carrier and being used for light tune
Signal processed is emitted on tested optical cable and receives the optical interface of transmission and the light modulating signal reflected on optical cable；Second radio frequency
Interface connects the signal processing circuit, and the signal processing circuit connects photoelectric conversion circuit, and the photoelectric conversion circuit connects
The optical interface is connect, the optical interface is for connecting tested optical cable.
The wireless communication module includes 4G controller and 4G antenna, and the 4G controller connects the 4G antenna, described
4G controller is for connecting the network parameter analysis module.
The utility model have the following advantages that and the utility model has the advantages that
1, it is excellent to have given full play to the calibration of vector network analyzer, Larger Dynamic range, high measurement accuracy etc. for the utility model
Gesture, can the parameters such as precise measurement optical fiber attenuation, splicing loss, fault point locating, can accurately obtain lightguide cable link to modulated signal
Influence.
2, the utility model dynamic range is big, easy to use.
Detailed description of the invention
Fig. 1 is the overall structure figure of the utility model；
Fig. 2 is the internal structure chart of the modules of the utility model；
Fig. 3 is the circuit diagram of the central control circuit of the utility model；
Fig. 4 is the circuit diagram of the signal processing circuit of the utility model；
Fig. 5 is the circuit diagram of the 4G controller of the utility model.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and embodiments.
As shown in Figure 1, a kind of optical fiber detector based on distributed vector network analyzer, including for generating radio frequency
The network parameter analysis module 1 of signal, the light for reflecting meeting by rf-signal modulation for light modulating signal and by tested cable
Modulated signal is demodulated into the light modulation demodulation module 2 and wireless communication module 3 of radiofrequency signal, and the light modulation demodulation module 2 is used
In connecting tested optical cable, the light modulation demodulation module 2 connects network parameter analysis module 1, the network parameter analysis module 1
Connect wireless communication module 3.
Principle explanation: radiofrequency signal is generated by network parameter analysis module 1 first, and radiofrequency signal is output to light modulation
Demodulation module 2 on rf-signal modulation to light carrier, will obtain light modulating signal by light modulation demodulation module 2, and be emitted to by
It surveys on optical cable.Reflected light modulating signal receives and is demodulated to radiofrequency signal by light modulation demodulation module 2 on tested optical cable,
And it is sent to network parameter analysis module 1, network parameter analysis is carried out by network parameter analysis module 1, modulated signal is obtained and exists
The parameters such as optical fiber attenuation, splicing loss, fault point locating in optical cable.
Fig. 2 give the utility model relates to three modules inside composition and electrical connection diagram, it is specific as follows:
Network parameter analysis module 1: the module is by radio frequency interface, radio circuit, central control circuit, 4G wireless interface group
At.The module is the core institution of the utility model, is responsible for the generation of electric signal, reception, data processing and to other modules
Control.Central control circuit controls radio circuit and generates radiofrequency signal according to information-setting by user, at the same will control signal and
Synchronous triggering signal is sent to the 4G controller of wireless communication module 3 by 4G wireless interface.Radio circuit generates certain frequency
With the radiofrequency signal of power, radiofrequency signal is sent to the radio frequency interface of light modulation demodulation module 2 by radio frequency interface.
Light modulation demodulation module 2: the module is by optical interface, photoelectric conversion circuit, signal processing circuit, radio frequency interface group
At.After the radio frequency interface of the module receives the radiofrequency signal that network parameter analysis module 1 generates, by signal processing circuit and photoelectricity
Conversion circuit on rf-signal modulation to light carrier, will obtain light modulating signal, and be emitted light modulating signal by optical interface
Onto tested optical cable.Meanwhile the module receives the light modulating signal for transmitting and reflecting on optical cable, is demodulated into radiofrequency signal,
And it is transmitted to network parameter analysis module 1 and is analyzed and handled.
Wireless communication module 3: the module is made of 4G controller and 4G antenna.When measuring optical cable, 4G controller is received
The control signal and synchronous triggering signal that network parameter analysis module 1 sends over, and company is sent a signal to by 4G antenna
It is connected in the detection device of the optical cable other end, realizes the synchronous triggering of two detection devices.
As shown in figure 3, the principle of the central control circuit of network parameter analysis module 1 is that user will be referred to by push-button unit
Order is sent to primary processor ARM chip, and ARM controls radio circuit and generate radiofrequency signal, simultaneously will according to the command information of user
Control signal and synchronous triggering signal are sent to the 4G controller of wireless communication module 3 by 4G wireless interface.ARM passes through LCD
Display real-time display operating status, and operation result is stored in eeprom memory.SRAM is used to as the memory of ARM
Store intermediate variable.
As shown in figure 4, the principle of the signal processing circuit of light modulation demodulation module 2 is that photoelectric conversion circuit turns optical signal
Ultra-weak electronic signal and reference signal are turned to, carries interference signal in reference signal；Ultra-weak electronic signal and reference signal pass respectively
It is defeated by preamplifier 1 and preamplifier 2；The output of preamplifier 1 and preamplifier 2 is connected respectively to differential amplification
Two input terminals of device, interference signal are exactly to be cancelled in difference amplifier.The output signal of difference amplifier is through filtering
Radio frequency interface is connected to after wave device.
As shown in figure 5, the 4G controller principle of wireless communication module 3 is: 4G interface control chip is wireless communication module 3
Core, communicated by spi bus and 4G wireless interface with network parameter analysis module 1；4G interface control chip is responsible for reception
The control signal, synchronous triggering signal and the calibration information that are sended over from network parameter analysis module 1, and will receive
Information is sent after amplification and filtering by 4G antenna.SIM card is connected with 4G interface control chip.
Claims (4)
1. a kind of optical fiber detector based on distributed vector network analyzer, which is characterized in that including for generating radio frequency
The network parameter analysis module of signal, the light tune for being light modulating signal by rf-signal modulation and being reflected back tested cable
Signal processed is demodulated into the light modulation demodulation module and wireless communication module of radiofrequency signal, and the light modulation demodulation module is for connecting
Tested optical cable, the light modulation demodulation module connect network parameter analysis module, and the network parameter analysis module connection is wireless
Communication module.
2. a kind of optical fiber detector based on distributed vector network analyzer according to claim 1, feature exist
In the network parameter analysis module includes: central control circuit, the first radio frequency interface, for the control in central control circuit
The lower radio circuit for generating radiofrequency signal of system is believed with for that will control signal under the control of central control circuit with synchronous triggering
Number it is sent to the 4G wireless interface of wireless communication module；First radio frequency interface connects the radio circuit, the radio frequency electrical
Road connects the central control circuit, and the central control circuit connects the 4G wireless interface, and the 4G wireless interface is used for
Connect wireless communication module.
3. a kind of optical fiber detector based on distributed vector network analyzer according to claim 1, feature exist
In the light modulation demodulation module includes that the second radio frequency for receiving the radiofrequency signal of network parameter analysis module generation connects
Mouthful, for by the signal processing circuit and photoelectric conversion circuit on rf-signal modulation to light carrier and being used to believe light modulation
It number is emitted on tested optical cable and receives the optical interface of light modulating signal for transmitting and reflecting on optical cable；Second radio frequency interface
The signal processing circuit is connected, the signal processing circuit connects photoelectric conversion circuit, and the photoelectric conversion circuit connects institute
Optical interface is stated, the optical interface is for connecting tested optical cable.
4. a kind of optical fiber detector based on distributed vector network analyzer according to claim 1, feature exist
In the wireless communication module includes 4G controller and 4G antenna, and the 4G controller connects the 4G antenna, the 4G control
Device is for connecting the network parameter analysis module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821004016.XU CN208337581U (en) | 2018-06-27 | 2018-06-27 | A kind of optical fiber detector based on distributed vector network analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821004016.XU CN208337581U (en) | 2018-06-27 | 2018-06-27 | A kind of optical fiber detector based on distributed vector network analyzer |
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| Publication Number | Publication Date |
|---|---|
| CN208337581U true CN208337581U (en) | 2019-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821004016.XU Expired - Fee Related CN208337581U (en) | 2018-06-27 | 2018-06-27 | A kind of optical fiber detector based on distributed vector network analyzer |
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| Country | Link |
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| CN (1) | CN208337581U (en) |
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2018
- 2018-06-27 CN CN201821004016.XU patent/CN208337581U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190104 |